The practice of which can affect the normal operation of the free market and limit the flexibility of buyers, is occasionally addressed in the ethics codes of companies or their purchasing policies. a. tying agreements b. just-in-time procurement c. quid pro quo d. supply partnerships e. reciprocity

The correct answer is E. reciprocity.

Explanation:

Reciprocity is a buying practice within some industries in which firms agree to buy each other's products. This reciprocal purchase agreement affects the normal functioning of a free market, since often this purchases do not maximize value to buyers and limit their options.

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